If you're looking for a solid pair of new earbuds and don't want to spend too much, Newegg.ca has a good deal on a Sennheiser model as pointed out by forum member Omnicron204. Right now, you can order the Sennheiser CX150 Earbuds on sale for $16.99 after applying the coupon code CEMCXTVN66 at the checkout which makes this a great time to upgrade or pick up a spare. Earbuds can be had for as little as $10 but these Sennheiser's are very popular, have received plenty of positive reviews and don't cost too much.
There are about 80 reviews submitted at Newegg.ca with the average rating for the CX150 at 4/5. After skimming the comments, most users seem happy with its affordability, great sound quality and deep bass. At an MSRP of $50, it'd be hard for anyone to justify paying for the CX150. At $20, though, we'd take a chance on it even if used as a spare.
We're not sure when the promo code will expire so you'll want to get your order in while you can. Shipping is $2.99.